Platen printing-machine.



PATENTED MAY 5, 1903.

I. WAITE. PLATEN PRINTING MACHINE.

APPLIOATION FILED AUG. 26- 1899.

3 SHEETSBHEET 1- 10 MODEL.

A ZTORNEYS p-az NuRms PEER! co, PHOTO-M1110" WASHINGTON, n. c.

PATENTED MAY 5,1903.

v r, WAITE. PLATEN PRINTING MACHINE.

APPLICATION FILED AUG. 26. 189 9.

8 SHEETS-SHEET 2.

H0 MODEL.

IN VENTOR A Tram/E78 WITNESSES.

PATENTED MAY 5, 1903.

F. WAITE;

, PLATEN PRINTING MACHINE.

APLIOATION FILED AUG. 26; 1899.

3 SHEETS -BHEBT 3.

110 MODEL.

Ammue s V/ TNESSES;

Patented May 5, 1903.

ATENT OFFICE- FRED WAITE, or OTLEY, ENGLAND.

PLATEN PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. '727,502, dated May 5, 1903.

Application filed August 26, 1899.

To all whom it may concern:

' Beit known that I, FRED WA1TE,& subject of the Queen of England, residing at The Lindens', Otley, England,have invented certain new and useful Improvements in Platen Printing-Machines, of which the following is a specification.

This invention particularly relates to improvements in that type of platen printingpresses in which the sheet is carried from the feed-table by grippers on the platen into position to be printed upon; and it consists in an arrangement for avoiding the necessity of moving the platen for this purpose, also in a modified form or arrangement of grippers.

In the accompanying drawings, Figure 1 is a side elevation of such parts of the machine as are necessary to illustrate the application of the mechanism for stopping the impression and for double inking. Fig. 2 is a similar view to Fig. l of certain of the parts, but moved to an operative position. Fig. 3 is a plan View of certain of the parts shown in Fig. 1. Fig. 4 is a view of the opposite side of Fig. 3 to that shown in Fig. 1. Fig. 5 is a sectional view illustrating a modified form of gripper and method of working it. Fig. 6 is a plan View of the platen and gripper. Fig. 7 is a sectional view showing the method of Working the grippers independent of the platen. In this figure the grippers are shown in the position they cupy when they have laid hold of the sheet projecting from the edge of the feed-table. Fig. 8 is a similar view with the grippers in the position they occupy aft-er carrying the sheet onto the platen. Fig. 9 is a plan view of the grippers in the position shown in Fig. 7.

The type-bed D is of ordinary design and is carried by arms 2 on each side, swinging upon the rocking shaft 3. The arms 2 are oscillated by rods D on each side, connected to the cranks or eccentric studs D in the wheels Dt, fixed on each end of the shaft B The ends 40f the rods D are coupled to eccentric projections on the shaft 6, mounted in the bearings 7 in the arms 2. A tappet-arm 10 is fixed on the shaft 6, and when this arm engages the antifriction-roller 12 the shaft 6 is rotated in its bearings to bring the eccentric ends 5 sufficiently around toward the platen to prevent the impression being Serial No- 728,583. (No model.)

made. In order that this may take place when it is desired to stop the impression either momentarily or automatically at every other stroke when double rolling is required, the antifriction-roller 12 is mounted on the arm 13 of the bell-crank lever; 14. This 1ever is normally vibrated with the arms 2, so as to prevent the tappet-arm l0 engaging the roller 12 by means of its arm '15,, coupled to the arm 16 on the shaft 3 by the compressible spring-coupling 17. A rod 19, connected to the top of the arm 13, slides to and fro through the guide-stud 20 in the side frame B,

and when it is desired to stop the impression -12 can be engaged by the tappet-arm 10.

To depress the end 21 of the lever 22 automatically, I pivot the bell-crank lever 8 on its stud 23, one arm 25 of which carries an antifriction-roller 26,bearin g against the starwheel 27, having depressions 28 in its periphery. The other arm 29 of the lever S has a weighted arm 30 pivoted to it, and the boss 31 of this lever projects across the lever 22. The star-wheel is intermittently operated, so that at every alternate movement of the typebed one of thedepressions 28 is presented to the antifriction-roller 26, and this permits the lever 8 to fall down and depress the lever 22. The star-wheel is fixed on the shaft 33, actuated by the ratchet 32 on itsother end, operated by the pawl 34, carried by the lever 35, lifted by a rod 36, connected to the platen or other moving part. The projection 37 on the lever engages a stop-piece 38 on the frame B and prevents the lever falling too far. To stop the impression other than for double rolling, the arm 30 is .turned over to the position shown by the broken line in Fig. 2, so that it rests upon and depressesthelever 22. The spring 62 is employed to draw the tappet 10 back against the stop 63 when it is disengaged by roller 12.

In Figs. 5 and 6 the grippers consist of a thin plate 40, having a pivot 41 at each end, fitting in bearings 42, projecting from the platen C. An arm 43 on one of the pivots carries a stud 44, which engages the forked end 45 of the lever 46, pivoted on the side of the platen and operated by the tappet F. The plate 40 is sufficiently away from the face of the platen to allow the delivery-grippers K and K to pass into the notches C in the platen and the plate to lay hold of the sheet. I

The feed-table A is carried on the arms A projecting from the rocking shaft A and a rising-and-falling movement is imparted to it. To stop the movement at every alternate stroke during double rolling, the star-wheel 39 is provided on the shaft 33, and a stud is provided on the arm A and at every alternate stroke one of the projections 9 on the star-wheel engages the stud 40 and keeps the table from falling. When double rolling is not required, the pawl 34 is disengaged from its ratchet.

The tappet F is pivoted on the side of and moves with the platen, and it is provided with an arm F which plays between and alternately engages two projections F and F upon the lever F mounted upon the rocking shaft 0 While the platen travels from beneath the feed-table into position to receive the impression the gripper 40 remains closed and retains the paper; but after the impression is made and the type-bed D has sufficiently receded the antifriction-roller F upon the lever F passes off the proud part F of the cam F and the lever, moving under the influence of its spring F brings its projection F against the tappet-arm F and moves the tappet sufliciently to open the grippers. As the platen moves back to beneath the feed-table the tappet is held in position to hold the gripper 40 open by the spring-detent G, pivoted to the side of the platen, engaging the rounded notch G in the tappet; but when the proud part F engages the antifrictionroller 1 the projection F moves the tappet so as to disengage it from the roller E and allow the gripper to close upon the edge of the paper projecting over the feed-table.

Instead of moving the platen it may normally lie in the position shown in Figs. 7and 8. In this case a gripper-bar 50 is employed, fixed to the arms 51 and 52, rigidly secured to the rocking shaft 0 The edge of the sheet is engaged between the grippers E and the bar 50. The grippers E are fixed on the gripper-shaft E mounted in bearings 54 in the arms 51 and 52, and the grippers are opened by the pinion 55 on the end of the shaft E engaging the toothed sector 56 on the end of the lever 57, operated in the same way as the lever 45. In this arrangement the grippers turn completely over to the position shown in Fig. 8 and form no obstruction to the delivery of the sheet.

I claim 1. In combination with the platen and the pivoted arms carrying the type-bed, of rods D for rocking said arms, eccentric connections between said rods and arms, a tappet for shifting said eccentric connection, a yielding stop against which said tappet contacts and means for holding said yielding stop stationary, substantially as described.

2. In combination with the platen and the pivoted arms carrying the type-bed, of rods for rocking said arms, eccentric connections between said rods and arms, a tappet for shifting said connections, a spring-pressed lever carryinga roller for contact with said tappet and means for automatically holding said lever against yielding, substantially as described.

3. In combination with the platen and pivoted arms carrying the type-bed, of rods for rocking said arms, an eccentric connection between said rods and arms, a tappet for shifting said connection, a yielding stop or abutment for coacting with said tappet, a weighted lever, a lever 8 cooperating therewith, an intermittingly-operated star-wheel and connections whereby the release of the weighted lever by the star-wheel and lever 8 holds said yielding stop stationary, substantially as described.

a. In combination, the platen and pivoted type-bed-carrying arms, the operating-rods eccentrically connected to said arms, the tappet for shifting said eccentric connections, a yielding lever 14, a stop 12 carried thereby for contact with the tappet, a rod 19, a weighted lever 22, a lever 23, a star-wheel cooperating therewith and a handlever 30 mounted on said lever 8 and coacting with said weighted lever, substantially as described.

5. In a printing-press, the combination with the rising-and-falling feed-table, of means for preventing the falling of the table independent of its normal operating means comprising a star-Wheel, a projection from the table resting upon said star-wheel, and means for rotating said star-wheel, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

FRED WAITE.

Witnesses:

JASON SAVILLE, DAVID NOWELL. 

